As we can know from the name, waterproof zips that conduct special treatment are mainly used to provide protection against the water/rain. They are mainly applied in outdoor activity products such as rain jackets, ski suits, down jackets, diving suits, tents, raincoats, waterproof shoes, fire suits, luggage and bags, outdoor jackets, fishing wears, dry bags, outdoor backpacks, soft portable coolers, seamless products, etc.
The easiest way to distinguish the waterproof zipper and a common zip is by checking whether the fabric cloth and teeth are covered. For waterproof zips, the film attached to the surface will cover the zip teeth and fabric, making them “invisible”.
Variety of Waterproof Zips
1) Based on the coating materials and special treatment applied, waterproof zips can be divided into:
imported PU coated waterproof zips
TPU coated waterproof zips
PVC coated waterproof zips
color film waterproof zips
printing series waterproof zips
2) Based on the manufacturing materials, waterproof zips can be classified into:
coil waterproof zips
plastic waterproof zips
metal waterproof zips
3) Based on their function waterproof zips can be grouped into:
civil waterproof zips, water repellent zippers
industrial heavy duty waterproof zips
TPU coated Waterproof Zips
TPU is an environmentally friendly high molecular polymer, which is regarded as a significant breakthrough in the application of waterproof and breathable fabrics.
TPU waterproof zips take more advantages in comparison with their PVC waterproof zippers. They are not only waterproof but also breathable with good flexibility and resistance to low/high temperature [-40℃, 100℃].
They are environmentally friendly, and the zippers can resist the longtime sun burning without color fading.
PVC Waterproof Zips
PVC is mainly composed of polyvinyl chloride, with other components involved to ensure better heat resistance, toughness and ductility.
As is indicated in the name, soft PVC contains softening agents, resulting in a limited range of applications due to such disadvantages as easy embrittlement and short-term storage time. It is mainly applied to the surface of floors, ceilings and leathers.
By comparison, hard PVC does not contain any softening agents and gains many outstanding advantages, including long-term storage time, good flexibility, easy molding with minimum embrittlement, poison and pollution.
Now, people pay more attention to the environment protection, so the PVC waterproof zippers are less used, and SZIP never use the PVC material for the waterproof zippers